/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineChatInterface.h
Determine if chat is allowed for a given user
if chat is allowed
bool IsChatAllowed ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & UserId, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & RecipientId ) const